Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * cs.c -- Kernel Card Services - core services | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License version 2 as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * The initial developer of the original code is David A. Hinds | |
9 | * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds | |
10 | * are Copyright (C) 1999 David A. Hinds. All Rights Reserved. | |
11 | * | |
12 | * (C) 1999 David A. Hinds | |
13 | */ | |
14 | ||
15 | #include <linux/module.h> | |
16 | #include <linux/moduleparam.h> | |
17 | #include <linux/init.h> | |
18 | #include <linux/kernel.h> | |
1da177e4 LT |
19 | #include <linux/string.h> |
20 | #include <linux/major.h> | |
21 | #include <linux/errno.h> | |
22 | #include <linux/slab.h> | |
23 | #include <linux/mm.h> | |
24 | #include <linux/interrupt.h> | |
25 | #include <linux/timer.h> | |
26 | #include <linux/ioport.h> | |
27 | #include <linux/delay.h> | |
28 | #include <linux/pm.h> | |
1da177e4 | 29 | #include <linux/device.h> |
1da9ab73 | 30 | #include <linux/kthread.h> |
7dfb7103 | 31 | #include <linux/freezer.h> |
1da177e4 LT |
32 | #include <asm/system.h> |
33 | #include <asm/irq.h> | |
34 | ||
1da177e4 LT |
35 | #include <pcmcia/cs_types.h> |
36 | #include <pcmcia/ss.h> | |
37 | #include <pcmcia/cs.h> | |
1da177e4 LT |
38 | #include <pcmcia/cistpl.h> |
39 | #include <pcmcia/cisreg.h> | |
40 | #include <pcmcia/ds.h> | |
41 | #include "cs_internal.h" | |
42 | ||
1da177e4 LT |
43 | |
44 | /* Module parameters */ | |
45 | ||
46 | MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>"); | |
33519ddd | 47 | MODULE_DESCRIPTION("Linux Kernel Card Services"); |
1da177e4 LT |
48 | MODULE_LICENSE("GPL"); |
49 | ||
50 | #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0444) | |
51 | ||
52 | INT_MODULE_PARM(setup_delay, 10); /* centiseconds */ | |
53 | INT_MODULE_PARM(resume_delay, 20); /* centiseconds */ | |
54 | INT_MODULE_PARM(shutdown_delay, 3); /* centiseconds */ | |
55 | INT_MODULE_PARM(vcc_settle, 40); /* centiseconds */ | |
56 | INT_MODULE_PARM(reset_time, 10); /* usecs */ | |
57 | INT_MODULE_PARM(unreset_delay, 10); /* centiseconds */ | |
58 | INT_MODULE_PARM(unreset_check, 10); /* centiseconds */ | |
59 | INT_MODULE_PARM(unreset_limit, 30); /* unreset_check's */ | |
60 | ||
61 | /* Access speed for attribute memory windows */ | |
62 | INT_MODULE_PARM(cis_speed, 300); /* ns */ | |
63 | ||
1da177e4 LT |
64 | |
65 | socket_state_t dead_socket = { | |
66 | .csc_mask = SS_DETECT, | |
67 | }; | |
33519ddd | 68 | EXPORT_SYMBOL(dead_socket); |
1da177e4 LT |
69 | |
70 | ||
71 | /* List of all sockets, protected by a rwsem */ | |
72 | LIST_HEAD(pcmcia_socket_list); | |
1da177e4 | 73 | EXPORT_SYMBOL(pcmcia_socket_list); |
1da177e4 | 74 | |
33519ddd DB |
75 | DECLARE_RWSEM(pcmcia_socket_list_rwsem); |
76 | EXPORT_SYMBOL(pcmcia_socket_list_rwsem); | |
1da177e4 | 77 | |
1da177e4 | 78 | |
78187865 | 79 | /* |
33519ddd DB |
80 | * Low-level PCMCIA socket drivers need to register with the PCCard |
81 | * core using pcmcia_register_socket. | |
82 | * | |
83 | * socket drivers are expected to use the following callbacks in their | |
1da177e4 LT |
84 | * .drv struct: |
85 | * - pcmcia_socket_dev_suspend | |
86 | * - pcmcia_socket_dev_resume | |
87 | * These functions check for the appropriate struct pcmcia_soket arrays, | |
88 | * and pass them to the low-level functions pcmcia_{suspend,resume}_socket | |
89 | */ | |
9905d1b4 RW |
90 | static int socket_early_resume(struct pcmcia_socket *skt); |
91 | static int socket_late_resume(struct pcmcia_socket *skt); | |
1da177e4 LT |
92 | static int socket_resume(struct pcmcia_socket *skt); |
93 | static int socket_suspend(struct pcmcia_socket *skt); | |
94 | ||
9905d1b4 RW |
95 | static void pcmcia_socket_dev_run(struct device *dev, |
96 | int (*cb)(struct pcmcia_socket *)) | |
1da177e4 LT |
97 | { |
98 | struct pcmcia_socket *socket; | |
99 | ||
100 | down_read(&pcmcia_socket_list_rwsem); | |
101 | list_for_each_entry(socket, &pcmcia_socket_list, socket_list) { | |
87373318 | 102 | if (socket->dev.parent != dev) |
1da177e4 | 103 | continue; |
7fe908dd | 104 | mutex_lock(&socket->skt_mutex); |
9905d1b4 | 105 | cb(socket); |
7fe908dd | 106 | mutex_unlock(&socket->skt_mutex); |
1da177e4 LT |
107 | } |
108 | up_read(&pcmcia_socket_list_rwsem); | |
9905d1b4 | 109 | } |
1da177e4 | 110 | |
9905d1b4 RW |
111 | int pcmcia_socket_dev_suspend(struct device *dev) |
112 | { | |
113 | pcmcia_socket_dev_run(dev, socket_suspend); | |
1da177e4 LT |
114 | return 0; |
115 | } | |
116 | EXPORT_SYMBOL(pcmcia_socket_dev_suspend); | |
117 | ||
9905d1b4 | 118 | void pcmcia_socket_dev_early_resume(struct device *dev) |
1da177e4 | 119 | { |
9905d1b4 RW |
120 | pcmcia_socket_dev_run(dev, socket_early_resume); |
121 | } | |
122 | EXPORT_SYMBOL(pcmcia_socket_dev_early_resume); | |
1da177e4 | 123 | |
9905d1b4 RW |
124 | void pcmcia_socket_dev_late_resume(struct device *dev) |
125 | { | |
126 | pcmcia_socket_dev_run(dev, socket_late_resume); | |
127 | } | |
128 | EXPORT_SYMBOL(pcmcia_socket_dev_late_resume); | |
1da177e4 | 129 | |
9905d1b4 RW |
130 | int pcmcia_socket_dev_resume(struct device *dev) |
131 | { | |
132 | pcmcia_socket_dev_run(dev, socket_resume); | |
1da177e4 LT |
133 | return 0; |
134 | } | |
135 | EXPORT_SYMBOL(pcmcia_socket_dev_resume); | |
136 | ||
137 | ||
9fea84f4 | 138 | struct pcmcia_socket *pcmcia_get_socket(struct pcmcia_socket *skt) |
1da177e4 | 139 | { |
87373318 GKH |
140 | struct device *dev = get_device(&skt->dev); |
141 | if (!dev) | |
1da177e4 | 142 | return NULL; |
87373318 | 143 | skt = dev_get_drvdata(dev); |
1da177e4 | 144 | if (!try_module_get(skt->owner)) { |
87373318 | 145 | put_device(&skt->dev); |
1da177e4 LT |
146 | return NULL; |
147 | } | |
9fea84f4 | 148 | return skt; |
1da177e4 LT |
149 | } |
150 | EXPORT_SYMBOL(pcmcia_get_socket); | |
151 | ||
152 | ||
153 | void pcmcia_put_socket(struct pcmcia_socket *skt) | |
154 | { | |
155 | module_put(skt->owner); | |
87373318 | 156 | put_device(&skt->dev); |
1da177e4 LT |
157 | } |
158 | EXPORT_SYMBOL(pcmcia_put_socket); | |
159 | ||
160 | ||
87373318 | 161 | static void pcmcia_release_socket(struct device *dev) |
1da177e4 | 162 | { |
87373318 | 163 | struct pcmcia_socket *socket = dev_get_drvdata(dev); |
1da177e4 LT |
164 | |
165 | complete(&socket->socket_released); | |
166 | } | |
167 | ||
168 | static int pccardd(void *__skt); | |
169 | ||
170 | /** | |
171 | * pcmcia_register_socket - add a new pcmcia socket device | |
78187865 | 172 | * @socket: the &socket to register |
1da177e4 LT |
173 | */ |
174 | int pcmcia_register_socket(struct pcmcia_socket *socket) | |
175 | { | |
1da9ab73 | 176 | struct task_struct *tsk; |
1da177e4 LT |
177 | int ret; |
178 | ||
87373318 | 179 | if (!socket || !socket->ops || !socket->dev.parent || !socket->resource_ops) |
1da177e4 LT |
180 | return -EINVAL; |
181 | ||
d50dbec3 | 182 | dev_dbg(&socket->dev, "pcmcia_register_socket(0x%p)\n", socket->ops); |
1da177e4 LT |
183 | |
184 | spin_lock_init(&socket->lock); | |
185 | ||
1da177e4 | 186 | /* try to obtain a socket number [yes, it gets ugly if we |
33519ddd DB |
187 | * register more than 2^sizeof(unsigned int) pcmcia |
188 | * sockets... but the socket number is deprecated | |
1da177e4 LT |
189 | * anyways, so I don't care] */ |
190 | down_write(&pcmcia_socket_list_rwsem); | |
191 | if (list_empty(&pcmcia_socket_list)) | |
192 | socket->sock = 0; | |
193 | else { | |
194 | unsigned int found, i = 1; | |
195 | struct pcmcia_socket *tmp; | |
196 | do { | |
197 | found = 1; | |
198 | list_for_each_entry(tmp, &pcmcia_socket_list, socket_list) { | |
199 | if (tmp->sock == i) | |
200 | found = 0; | |
201 | } | |
202 | i++; | |
203 | } while (!found); | |
204 | socket->sock = i - 1; | |
205 | } | |
206 | list_add_tail(&socket->socket_list, &pcmcia_socket_list); | |
207 | up_write(&pcmcia_socket_list_rwsem); | |
208 | ||
5bc6b68a RK |
209 | #ifndef CONFIG_CARDBUS |
210 | /* | |
211 | * If we do not support Cardbus, ensure that | |
212 | * the Cardbus socket capability is disabled. | |
213 | */ | |
214 | socket->features &= ~SS_CAP_CARDBUS; | |
215 | #endif | |
1da177e4 LT |
216 | |
217 | /* set proper values in socket->dev */ | |
87373318 | 218 | dev_set_drvdata(&socket->dev, socket); |
1da177e4 | 219 | socket->dev.class = &pcmcia_socket_class; |
25096986 | 220 | dev_set_name(&socket->dev, "pcmcia_socket%u", socket->sock); |
1da177e4 LT |
221 | |
222 | /* base address = 0, map = 0 */ | |
223 | socket->cis_mem.flags = 0; | |
224 | socket->cis_mem.speed = cis_speed; | |
225 | ||
226 | INIT_LIST_HEAD(&socket->cis_cache); | |
227 | ||
228 | init_completion(&socket->socket_released); | |
229 | init_completion(&socket->thread_done); | |
7fe908dd | 230 | mutex_init(&socket->skt_mutex); |
1da177e4 LT |
231 | spin_lock_init(&socket->thread_lock); |
232 | ||
b1769450 DB |
233 | if (socket->resource_ops->init) { |
234 | ret = socket->resource_ops->init(socket); | |
235 | if (ret) | |
236 | goto err; | |
237 | } | |
238 | ||
1da9ab73 SH |
239 | tsk = kthread_run(pccardd, socket, "pccardd"); |
240 | if (IS_ERR(tsk)) { | |
241 | ret = PTR_ERR(tsk); | |
1da177e4 | 242 | goto err; |
1da9ab73 | 243 | } |
1da177e4 LT |
244 | |
245 | wait_for_completion(&socket->thread_done); | |
1da9ab73 | 246 | if (!socket->thread) { |
2e55bf6b DB |
247 | dev_printk(KERN_WARNING, &socket->dev, |
248 | "PCMCIA: warning: socket thread did not start\n"); | |
1da177e4 LT |
249 | return -EIO; |
250 | } | |
1da9ab73 | 251 | |
1da177e4 LT |
252 | pcmcia_parse_events(socket, SS_DETECT); |
253 | ||
638bba55 DB |
254 | /* |
255 | * Let's try to get the PCMCIA module for 16-bit PCMCIA support. | |
256 | * If it fails, it doesn't matter -- we still have 32-bit CardBus | |
257 | * support to offer, so this is not a failure mode. | |
258 | */ | |
259 | request_module_nowait("pcmcia"); | |
260 | ||
1da177e4 LT |
261 | return 0; |
262 | ||
263 | err: | |
264 | down_write(&pcmcia_socket_list_rwsem); | |
265 | list_del(&socket->socket_list); | |
266 | up_write(&pcmcia_socket_list_rwsem); | |
267 | return ret; | |
268 | } /* pcmcia_register_socket */ | |
269 | EXPORT_SYMBOL(pcmcia_register_socket); | |
270 | ||
271 | ||
272 | /** | |
273 | * pcmcia_unregister_socket - remove a pcmcia socket device | |
78187865 | 274 | * @socket: the &socket to unregister |
1da177e4 LT |
275 | */ |
276 | void pcmcia_unregister_socket(struct pcmcia_socket *socket) | |
277 | { | |
278 | if (!socket) | |
279 | return; | |
280 | ||
d50dbec3 | 281 | dev_dbg(&socket->dev, "pcmcia_unregister_socket(0x%p)\n", socket->ops); |
1da177e4 | 282 | |
0b402094 | 283 | if (socket->thread) |
1da9ab73 | 284 | kthread_stop(socket->thread); |
0b402094 | 285 | |
1da177e4 LT |
286 | /* remove from our own list */ |
287 | down_write(&pcmcia_socket_list_rwsem); | |
288 | list_del(&socket->socket_list); | |
289 | up_write(&pcmcia_socket_list_rwsem); | |
290 | ||
291 | /* wait for sysfs to drop all references */ | |
292 | release_resource_db(socket); | |
293 | wait_for_completion(&socket->socket_released); | |
294 | } /* pcmcia_unregister_socket */ | |
295 | EXPORT_SYMBOL(pcmcia_unregister_socket); | |
296 | ||
297 | ||
9fea84f4 | 298 | struct pcmcia_socket *pcmcia_get_socket_by_nr(unsigned int nr) |
1da177e4 LT |
299 | { |
300 | struct pcmcia_socket *s; | |
301 | ||
302 | down_read(&pcmcia_socket_list_rwsem); | |
303 | list_for_each_entry(s, &pcmcia_socket_list, socket_list) | |
304 | if (s->sock == nr) { | |
305 | up_read(&pcmcia_socket_list_rwsem); | |
306 | return s; | |
307 | } | |
308 | up_read(&pcmcia_socket_list_rwsem); | |
309 | ||
310 | return NULL; | |
311 | ||
312 | } | |
313 | EXPORT_SYMBOL(pcmcia_get_socket_by_nr); | |
314 | ||
78187865 | 315 | /* |
33519ddd DB |
316 | * The central event handler. Send_event() sends an event to the |
317 | * 16-bit subsystem, which then calls the relevant device drivers. | |
318 | * Parse_events() interprets the event bits from | |
319 | * a card status change report. Do_shutdown() handles the high | |
320 | * priority stuff associated with a card removal. | |
321 | */ | |
1da177e4 LT |
322 | |
323 | /* NOTE: send_event needs to be called with skt->sem held. */ | |
324 | ||
325 | static int send_event(struct pcmcia_socket *s, event_t event, int priority) | |
326 | { | |
327 | int ret; | |
328 | ||
88b060d6 | 329 | if ((s->state & SOCKET_CARDBUS) && (event != CS_EVENT_CARD_REMOVAL)) |
1da177e4 LT |
330 | return 0; |
331 | ||
d50dbec3 | 332 | dev_dbg(&s->dev, "send_event(event %d, pri %d, callback 0x%p)\n", |
1da177e4 LT |
333 | event, priority, s->callback); |
334 | ||
335 | if (!s->callback) | |
336 | return 0; | |
337 | if (!try_module_get(s->callback->owner)) | |
338 | return 0; | |
339 | ||
340 | ret = s->callback->event(s, event, priority); | |
341 | ||
342 | module_put(s->callback->owner); | |
343 | ||
344 | return ret; | |
345 | } | |
346 | ||
1da177e4 LT |
347 | static int socket_reset(struct pcmcia_socket *skt) |
348 | { | |
349 | int status, i; | |
350 | ||
d50dbec3 | 351 | dev_dbg(&skt->dev, "reset\n"); |
1da177e4 LT |
352 | |
353 | skt->socket.flags |= SS_OUTPUT_ENA | SS_RESET; | |
354 | skt->ops->set_socket(skt, &skt->socket); | |
355 | udelay((long)reset_time); | |
356 | ||
357 | skt->socket.flags &= ~SS_RESET; | |
358 | skt->ops->set_socket(skt, &skt->socket); | |
359 | ||
360 | msleep(unreset_delay * 10); | |
361 | for (i = 0; i < unreset_limit; i++) { | |
362 | skt->ops->get_status(skt, &status); | |
363 | ||
364 | if (!(status & SS_DETECT)) | |
3939c1ef | 365 | return -ENODEV; |
1da177e4 LT |
366 | |
367 | if (status & SS_READY) | |
4c89e88b | 368 | return 0; |
1da177e4 LT |
369 | |
370 | msleep(unreset_check * 10); | |
371 | } | |
372 | ||
d50dbec3 | 373 | dev_printk(KERN_ERR, &skt->dev, "time out after reset.\n"); |
8567142e | 374 | return -ETIMEDOUT; |
1da177e4 LT |
375 | } |
376 | ||
78187865 | 377 | /* |
6e493882 DR |
378 | * socket_setup() and socket_shutdown() are called by the main event handler |
379 | * when card insertion and removal events are received. | |
380 | * socket_setup() turns on socket power and resets the socket, in two stages. | |
381 | * socket_shutdown() unconfigures a socket and turns off socket power. | |
382 | */ | |
383 | static void socket_shutdown(struct pcmcia_socket *s) | |
384 | { | |
385 | int status; | |
386 | ||
d50dbec3 | 387 | dev_dbg(&s->dev, "shutdown\n"); |
6e493882 | 388 | |
88b060d6 | 389 | send_event(s, CS_EVENT_CARD_REMOVAL, CS_EVENT_PRI_HIGH); |
6e493882 DR |
390 | s->state &= SOCKET_INUSE | SOCKET_PRESENT; |
391 | msleep(shutdown_delay * 10); | |
392 | s->state &= SOCKET_INUSE; | |
393 | ||
394 | /* Blank out the socket state */ | |
395 | s->socket = dead_socket; | |
396 | s->ops->init(s); | |
397 | s->ops->set_socket(s, &s->socket); | |
398 | s->irq.AssignedIRQ = s->irq.Config = 0; | |
399 | s->lock_count = 0; | |
904e3777 DB |
400 | kfree(s->fake_cis); |
401 | s->fake_cis = NULL; | |
6e493882 DR |
402 | #ifdef CONFIG_CARDBUS |
403 | cb_free(s); | |
404 | #endif | |
405 | s->functions = 0; | |
6e493882 | 406 | |
afb2c165 DR |
407 | /* give socket some time to power down */ |
408 | msleep(100); | |
409 | ||
6e493882 DR |
410 | s->ops->get_status(s, &status); |
411 | if (status & SS_POWERON) { | |
2e55bf6b DB |
412 | dev_printk(KERN_ERR, &s->dev, |
413 | "*** DANGER *** unable to remove socket power\n"); | |
6e493882 DR |
414 | } |
415 | ||
416 | cs_socket_put(s); | |
417 | } | |
418 | ||
1da177e4 LT |
419 | static int socket_setup(struct pcmcia_socket *skt, int initial_delay) |
420 | { | |
421 | int status, i; | |
422 | ||
d50dbec3 | 423 | dev_dbg(&skt->dev, "setup\n"); |
1da177e4 LT |
424 | |
425 | skt->ops->get_status(skt, &status); | |
426 | if (!(status & SS_DETECT)) | |
3939c1ef | 427 | return -ENODEV; |
1da177e4 LT |
428 | |
429 | msleep(initial_delay * 10); | |
430 | ||
431 | for (i = 0; i < 100; i++) { | |
432 | skt->ops->get_status(skt, &status); | |
433 | if (!(status & SS_DETECT)) | |
3939c1ef | 434 | return -ENODEV; |
1da177e4 LT |
435 | |
436 | if (!(status & SS_PENDING)) | |
437 | break; | |
438 | ||
439 | msleep(100); | |
440 | } | |
441 | ||
442 | if (status & SS_PENDING) { | |
d50dbec3 DB |
443 | dev_printk(KERN_ERR, &skt->dev, |
444 | "voltage interrogation timed out.\n"); | |
8567142e | 445 | return -ETIMEDOUT; |
1da177e4 LT |
446 | } |
447 | ||
448 | if (status & SS_CARDBUS) { | |
5bc6b68a | 449 | if (!(skt->features & SS_CAP_CARDBUS)) { |
d50dbec3 DB |
450 | dev_printk(KERN_ERR, &skt->dev, |
451 | "cardbus cards are not supported.\n"); | |
610e2374 | 452 | return -EINVAL; |
5bc6b68a | 453 | } |
1da177e4 | 454 | skt->state |= SOCKET_CARDBUS; |
88b060d6 DB |
455 | } else |
456 | skt->state &= ~SOCKET_CARDBUS; | |
1da177e4 LT |
457 | |
458 | /* | |
459 | * Decode the card voltage requirements, and apply power to the card. | |
460 | */ | |
461 | if (status & SS_3VCARD) | |
462 | skt->socket.Vcc = skt->socket.Vpp = 33; | |
463 | else if (!(status & SS_XVCARD)) | |
464 | skt->socket.Vcc = skt->socket.Vpp = 50; | |
465 | else { | |
d50dbec3 | 466 | dev_printk(KERN_ERR, &skt->dev, "unsupported voltage key.\n"); |
610e2374 | 467 | return -EIO; |
1da177e4 | 468 | } |
fa912bcb DR |
469 | |
470 | if (skt->power_hook) | |
471 | skt->power_hook(skt, HOOK_POWER_PRE); | |
472 | ||
1da177e4 LT |
473 | skt->socket.flags = 0; |
474 | skt->ops->set_socket(skt, &skt->socket); | |
475 | ||
476 | /* | |
477 | * Wait "vcc_settle" for the supply to stabilise. | |
478 | */ | |
479 | msleep(vcc_settle * 10); | |
480 | ||
481 | skt->ops->get_status(skt, &status); | |
482 | if (!(status & SS_POWERON)) { | |
d50dbec3 | 483 | dev_printk(KERN_ERR, &skt->dev, "unable to apply power.\n"); |
610e2374 | 484 | return -EIO; |
1da177e4 LT |
485 | } |
486 | ||
fa912bcb DR |
487 | status = socket_reset(skt); |
488 | ||
489 | if (skt->power_hook) | |
490 | skt->power_hook(skt, HOOK_POWER_POST); | |
491 | ||
492 | return status; | |
1da177e4 LT |
493 | } |
494 | ||
495 | /* | |
496 | * Handle card insertion. Setup the socket, reset the card, | |
497 | * and then tell the rest of PCMCIA that a card is present. | |
498 | */ | |
499 | static int socket_insert(struct pcmcia_socket *skt) | |
500 | { | |
501 | int ret; | |
502 | ||
d50dbec3 | 503 | dev_dbg(&skt->dev, "insert\n"); |
1da177e4 LT |
504 | |
505 | if (!cs_socket_get(skt)) | |
3939c1ef | 506 | return -ENODEV; |
1da177e4 LT |
507 | |
508 | ret = socket_setup(skt, setup_delay); | |
4c89e88b | 509 | if (ret == 0) { |
1da177e4 | 510 | skt->state |= SOCKET_PRESENT; |
807277cb | 511 | |
2e55bf6b DB |
512 | dev_printk(KERN_NOTICE, &skt->dev, |
513 | "pccard: %s card inserted into slot %d\n", | |
514 | (skt->state & SOCKET_CARDBUS) ? "CardBus" : "PCMCIA", | |
515 | skt->sock); | |
807277cb | 516 | |
1da177e4 LT |
517 | #ifdef CONFIG_CARDBUS |
518 | if (skt->state & SOCKET_CARDBUS) { | |
519 | cb_alloc(skt); | |
520 | skt->state |= SOCKET_CARDBUS_CONFIG; | |
521 | } | |
522 | #endif | |
d50dbec3 | 523 | dev_dbg(&skt->dev, "insert done\n"); |
1da177e4 LT |
524 | |
525 | send_event(skt, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW); | |
526 | } else { | |
527 | socket_shutdown(skt); | |
1da177e4 LT |
528 | } |
529 | ||
530 | return ret; | |
531 | } | |
532 | ||
533 | static int socket_suspend(struct pcmcia_socket *skt) | |
534 | { | |
535 | if (skt->state & SOCKET_SUSPEND) | |
f958095e | 536 | return -EBUSY; |
1da177e4 | 537 | |
88b060d6 DB |
538 | skt->suspended_state = skt->state; |
539 | ||
1da177e4 LT |
540 | send_event(skt, CS_EVENT_PM_SUSPEND, CS_EVENT_PRI_LOW); |
541 | skt->socket = dead_socket; | |
542 | skt->ops->set_socket(skt, &skt->socket); | |
543 | if (skt->ops->suspend) | |
544 | skt->ops->suspend(skt); | |
545 | skt->state |= SOCKET_SUSPEND; | |
546 | ||
4c89e88b | 547 | return 0; |
1da177e4 LT |
548 | } |
549 | ||
9905d1b4 | 550 | static int socket_early_resume(struct pcmcia_socket *skt) |
1da177e4 | 551 | { |
1da177e4 LT |
552 | skt->socket = dead_socket; |
553 | skt->ops->init(skt); | |
554 | skt->ops->set_socket(skt, &skt->socket); | |
9905d1b4 RW |
555 | if (skt->state & SOCKET_PRESENT) |
556 | skt->resume_status = socket_setup(skt, resume_delay); | |
557 | return 0; | |
558 | } | |
1da177e4 | 559 | |
9905d1b4 RW |
560 | static int socket_late_resume(struct pcmcia_socket *skt) |
561 | { | |
88b060d6 DB |
562 | skt->state &= ~SOCKET_SUSPEND; |
563 | ||
564 | if (!(skt->state & SOCKET_PRESENT)) | |
1da177e4 | 565 | return socket_insert(skt); |
88b060d6 DB |
566 | |
567 | if (skt->resume_status) { | |
568 | socket_shutdown(skt); | |
569 | return 0; | |
1da177e4 LT |
570 | } |
571 | ||
88b060d6 DB |
572 | if (skt->suspended_state != skt->state) { |
573 | dev_dbg(&skt->dev, | |
574 | "suspend state 0x%x != resume state 0x%x\n", | |
575 | skt->suspended_state, skt->state); | |
576 | ||
1da177e4 | 577 | socket_shutdown(skt); |
88b060d6 | 578 | return socket_insert(skt); |
1da177e4 LT |
579 | } |
580 | ||
88b060d6 DB |
581 | #ifdef CONFIG_CARDBUS |
582 | if (skt->state & SOCKET_CARDBUS) { | |
583 | /* We can't be sure the CardBus card is the same | |
584 | * as the one previously inserted. Therefore, remove | |
585 | * and re-add... */ | |
586 | cb_free(skt); | |
587 | cb_alloc(skt); | |
588 | return 0; | |
589 | } | |
590 | #endif | |
1da177e4 | 591 | |
88b060d6 | 592 | send_event(skt, CS_EVENT_PM_RESUME, CS_EVENT_PRI_LOW); |
4c89e88b | 593 | return 0; |
1da177e4 LT |
594 | } |
595 | ||
9905d1b4 RW |
596 | /* |
597 | * Resume a socket. If a card is present, verify its CIS against | |
598 | * our cached copy. If they are different, the card has been | |
599 | * replaced, and we need to tell the drivers. | |
600 | */ | |
601 | static int socket_resume(struct pcmcia_socket *skt) | |
602 | { | |
603 | if (!(skt->state & SOCKET_SUSPEND)) | |
604 | return -EBUSY; | |
605 | ||
606 | socket_early_resume(skt); | |
607 | return socket_late_resume(skt); | |
608 | } | |
609 | ||
1da177e4 LT |
610 | static void socket_remove(struct pcmcia_socket *skt) |
611 | { | |
2e55bf6b DB |
612 | dev_printk(KERN_NOTICE, &skt->dev, |
613 | "pccard: card ejected from slot %d\n", skt->sock); | |
1da177e4 | 614 | socket_shutdown(skt); |
1da177e4 LT |
615 | } |
616 | ||
617 | /* | |
618 | * Process a socket card detect status change. | |
619 | * | |
620 | * If we don't have a card already present, delay the detect event for | |
621 | * about 20ms (to be on the safe side) before reading the socket status. | |
622 | * | |
623 | * Some i82365-based systems send multiple SS_DETECT events during card | |
624 | * insertion, and the "card present" status bit seems to bounce. This | |
625 | * will probably be true with GPIO-based card detection systems after | |
626 | * the product has aged. | |
627 | */ | |
628 | static void socket_detect_change(struct pcmcia_socket *skt) | |
629 | { | |
630 | if (!(skt->state & SOCKET_SUSPEND)) { | |
631 | int status; | |
632 | ||
633 | if (!(skt->state & SOCKET_PRESENT)) | |
634 | msleep(20); | |
635 | ||
636 | skt->ops->get_status(skt, &status); | |
637 | if ((skt->state & SOCKET_PRESENT) && | |
638 | !(status & SS_DETECT)) | |
639 | socket_remove(skt); | |
640 | if (!(skt->state & SOCKET_PRESENT) && | |
641 | (status & SS_DETECT)) | |
642 | socket_insert(skt); | |
643 | } | |
644 | } | |
645 | ||
646 | static int pccardd(void *__skt) | |
647 | { | |
648 | struct pcmcia_socket *skt = __skt; | |
1da177e4 LT |
649 | int ret; |
650 | ||
1da177e4 LT |
651 | skt->thread = current; |
652 | skt->socket = dead_socket; | |
653 | skt->ops->init(skt); | |
654 | skt->ops->set_socket(skt, &skt->socket); | |
655 | ||
656 | /* register with the device core */ | |
87373318 | 657 | ret = device_register(&skt->dev); |
1da177e4 | 658 | if (ret) { |
2e55bf6b DB |
659 | dev_printk(KERN_WARNING, &skt->dev, |
660 | "PCMCIA: unable to register socket\n"); | |
1da177e4 | 661 | skt->thread = NULL; |
1da9ab73 SH |
662 | complete(&skt->thread_done); |
663 | return 0; | |
1da177e4 | 664 | } |
4356d73d DB |
665 | ret = pccard_sysfs_add_socket(&skt->dev); |
666 | if (ret) | |
667 | dev_warn(&skt->dev, "err %d adding socket attributes\n", ret); | |
1da177e4 | 668 | |
bf4de6f2 DR |
669 | complete(&skt->thread_done); |
670 | ||
83144186 | 671 | set_freezable(); |
1da177e4 LT |
672 | for (;;) { |
673 | unsigned long flags; | |
674 | unsigned int events; | |
675 | ||
676 | set_current_state(TASK_INTERRUPTIBLE); | |
677 | ||
678 | spin_lock_irqsave(&skt->thread_lock, flags); | |
679 | events = skt->thread_events; | |
680 | skt->thread_events = 0; | |
681 | spin_unlock_irqrestore(&skt->thread_lock, flags); | |
682 | ||
683 | if (events) { | |
7fe908dd | 684 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
685 | if (events & SS_DETECT) |
686 | socket_detect_change(skt); | |
687 | if (events & SS_BATDEAD) | |
688 | send_event(skt, CS_EVENT_BATTERY_DEAD, CS_EVENT_PRI_LOW); | |
689 | if (events & SS_BATWARN) | |
690 | send_event(skt, CS_EVENT_BATTERY_LOW, CS_EVENT_PRI_LOW); | |
691 | if (events & SS_READY) | |
692 | send_event(skt, CS_EVENT_READY_CHANGE, CS_EVENT_PRI_LOW); | |
7fe908dd | 693 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
694 | continue; |
695 | } | |
696 | ||
1da9ab73 | 697 | if (kthread_should_stop()) |
1da177e4 | 698 | break; |
bf4de6f2 DR |
699 | |
700 | schedule(); | |
701 | try_to_freeze(); | |
1da177e4 | 702 | } |
220ec029 SR |
703 | /* make sure we are running before we exit */ |
704 | set_current_state(TASK_RUNNING); | |
705 | ||
1da177e4 | 706 | /* remove from the device core */ |
4356d73d | 707 | pccard_sysfs_remove_socket(&skt->dev); |
87373318 | 708 | device_unregister(&skt->dev); |
1da177e4 | 709 | |
1da9ab73 | 710 | return 0; |
1da177e4 LT |
711 | } |
712 | ||
713 | /* | |
714 | * Yenta (at least) probes interrupts before registering the socket and | |
715 | * starting the handler thread. | |
716 | */ | |
717 | void pcmcia_parse_events(struct pcmcia_socket *s, u_int events) | |
718 | { | |
4b7a89a3 | 719 | unsigned long flags; |
d50dbec3 | 720 | dev_dbg(&s->dev, "parse_events: events %08x\n", events); |
1da177e4 | 721 | if (s->thread) { |
4b7a89a3 | 722 | spin_lock_irqsave(&s->thread_lock, flags); |
1da177e4 | 723 | s->thread_events |= events; |
4b7a89a3 | 724 | spin_unlock_irqrestore(&s->thread_lock, flags); |
1da177e4 | 725 | |
0b402094 | 726 | wake_up_process(s->thread); |
1da177e4 LT |
727 | } |
728 | } /* pcmcia_parse_events */ | |
33519ddd | 729 | EXPORT_SYMBOL(pcmcia_parse_events); |
1da177e4 | 730 | |
1da177e4 LT |
731 | |
732 | /* register pcmcia_callback */ | |
733 | int pccard_register_pcmcia(struct pcmcia_socket *s, struct pcmcia_callback *c) | |
734 | { | |
9fea84f4 | 735 | int ret = 0; |
1da177e4 | 736 | |
7fe908dd DB |
737 | /* s->skt_mutex also protects s->callback */ |
738 | mutex_lock(&s->skt_mutex); | |
1da177e4 LT |
739 | |
740 | if (c) { | |
741 | /* registration */ | |
742 | if (s->callback) { | |
743 | ret = -EBUSY; | |
744 | goto err; | |
745 | } | |
746 | ||
747 | s->callback = c; | |
748 | ||
749 | if ((s->state & (SOCKET_PRESENT|SOCKET_CARDBUS)) == SOCKET_PRESENT) | |
750 | send_event(s, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW); | |
751 | } else | |
752 | s->callback = NULL; | |
753 | err: | |
7fe908dd | 754 | mutex_unlock(&s->skt_mutex); |
1da177e4 LT |
755 | |
756 | return ret; | |
757 | } | |
758 | EXPORT_SYMBOL(pccard_register_pcmcia); | |
759 | ||
1da177e4 | 760 | |
33519ddd DB |
761 | /* I'm not sure which "reset" function this is supposed to use, |
762 | * but for now, it uses the low-level interface's reset, not the | |
763 | * CIS register. | |
764 | */ | |
1da177e4 | 765 | |
994917f8 | 766 | int pcmcia_reset_card(struct pcmcia_socket *skt) |
1da177e4 LT |
767 | { |
768 | int ret; | |
33519ddd | 769 | |
d50dbec3 | 770 | dev_dbg(&skt->dev, "resetting socket\n"); |
1da177e4 | 771 | |
7fe908dd | 772 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
773 | do { |
774 | if (!(skt->state & SOCKET_PRESENT)) { | |
6d9a299f | 775 | dev_dbg(&skt->dev, "can't reset, not present\n"); |
3939c1ef | 776 | ret = -ENODEV; |
1da177e4 LT |
777 | break; |
778 | } | |
779 | if (skt->state & SOCKET_SUSPEND) { | |
6d9a299f | 780 | dev_dbg(&skt->dev, "can't reset, suspended\n"); |
f958095e | 781 | ret = -EBUSY; |
1da177e4 LT |
782 | break; |
783 | } | |
784 | if (skt->state & SOCKET_CARDBUS) { | |
6d9a299f | 785 | dev_dbg(&skt->dev, "can't reset, is cardbus\n"); |
de6405e9 | 786 | ret = -EPERM; |
1da177e4 LT |
787 | break; |
788 | } | |
789 | ||
790 | ret = send_event(skt, CS_EVENT_RESET_REQUEST, CS_EVENT_PRI_LOW); | |
791 | if (ret == 0) { | |
792 | send_event(skt, CS_EVENT_RESET_PHYSICAL, CS_EVENT_PRI_LOW); | |
8e9e793d DB |
793 | if (skt->callback) |
794 | skt->callback->suspend(skt); | |
4c89e88b | 795 | if (socket_reset(skt) == 0) { |
1da177e4 | 796 | send_event(skt, CS_EVENT_CARD_RESET, CS_EVENT_PRI_LOW); |
8e9e793d DB |
797 | if (skt->callback) |
798 | skt->callback->resume(skt); | |
799 | } | |
1da177e4 LT |
800 | } |
801 | ||
4c89e88b | 802 | ret = 0; |
1da177e4 | 803 | } while (0); |
7fe908dd | 804 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
805 | |
806 | return ret; | |
807 | } /* reset_card */ | |
994917f8 | 808 | EXPORT_SYMBOL(pcmcia_reset_card); |
1da177e4 | 809 | |
1da177e4 | 810 | |
33519ddd DB |
811 | /* These shut down or wake up a socket. They are sort of user |
812 | * initiated versions of the APM suspend and resume actions. | |
813 | */ | |
1da177e4 LT |
814 | int pcmcia_suspend_card(struct pcmcia_socket *skt) |
815 | { | |
816 | int ret; | |
33519ddd | 817 | |
d50dbec3 | 818 | dev_dbg(&skt->dev, "suspending socket\n"); |
1da177e4 | 819 | |
7fe908dd | 820 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
821 | do { |
822 | if (!(skt->state & SOCKET_PRESENT)) { | |
3939c1ef | 823 | ret = -ENODEV; |
1da177e4 LT |
824 | break; |
825 | } | |
826 | if (skt->state & SOCKET_CARDBUS) { | |
de6405e9 | 827 | ret = -EPERM; |
1da177e4 LT |
828 | break; |
829 | } | |
8e9e793d DB |
830 | if (skt->callback) { |
831 | ret = skt->callback->suspend(skt); | |
832 | if (ret) | |
833 | break; | |
834 | } | |
1da177e4 LT |
835 | ret = socket_suspend(skt); |
836 | } while (0); | |
7fe908dd | 837 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
838 | |
839 | return ret; | |
840 | } /* suspend_card */ | |
33519ddd DB |
841 | EXPORT_SYMBOL(pcmcia_suspend_card); |
842 | ||
1da177e4 LT |
843 | |
844 | int pcmcia_resume_card(struct pcmcia_socket *skt) | |
845 | { | |
846 | int ret; | |
9fea84f4 | 847 | |
d50dbec3 | 848 | dev_dbg(&skt->dev, "waking up socket\n"); |
1da177e4 | 849 | |
7fe908dd | 850 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
851 | do { |
852 | if (!(skt->state & SOCKET_PRESENT)) { | |
3939c1ef | 853 | ret = -ENODEV; |
1da177e4 LT |
854 | break; |
855 | } | |
856 | if (skt->state & SOCKET_CARDBUS) { | |
de6405e9 | 857 | ret = -EPERM; |
1da177e4 LT |
858 | break; |
859 | } | |
860 | ret = socket_resume(skt); | |
8e9e793d DB |
861 | if (!ret && skt->callback) |
862 | skt->callback->resume(skt); | |
1da177e4 | 863 | } while (0); |
7fe908dd | 864 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
865 | |
866 | return ret; | |
867 | } /* resume_card */ | |
33519ddd | 868 | EXPORT_SYMBOL(pcmcia_resume_card); |
1da177e4 | 869 | |
1da177e4 | 870 | |
33519ddd | 871 | /* These handle user requests to eject or insert a card. */ |
1da177e4 LT |
872 | int pcmcia_eject_card(struct pcmcia_socket *skt) |
873 | { | |
874 | int ret; | |
9fea84f4 | 875 | |
d50dbec3 | 876 | dev_dbg(&skt->dev, "user eject request\n"); |
1da177e4 | 877 | |
7fe908dd | 878 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
879 | do { |
880 | if (!(skt->state & SOCKET_PRESENT)) { | |
881 | ret = -ENODEV; | |
882 | break; | |
883 | } | |
884 | ||
885 | ret = send_event(skt, CS_EVENT_EJECTION_REQUEST, CS_EVENT_PRI_LOW); | |
886 | if (ret != 0) { | |
887 | ret = -EINVAL; | |
888 | break; | |
889 | } | |
890 | ||
891 | socket_remove(skt); | |
892 | ret = 0; | |
893 | } while (0); | |
7fe908dd | 894 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
895 | |
896 | return ret; | |
897 | } /* eject_card */ | |
33519ddd DB |
898 | EXPORT_SYMBOL(pcmcia_eject_card); |
899 | ||
1da177e4 LT |
900 | |
901 | int pcmcia_insert_card(struct pcmcia_socket *skt) | |
902 | { | |
903 | int ret; | |
904 | ||
d50dbec3 | 905 | dev_dbg(&skt->dev, "user insert request\n"); |
1da177e4 | 906 | |
7fe908dd | 907 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
908 | do { |
909 | if (skt->state & SOCKET_PRESENT) { | |
910 | ret = -EBUSY; | |
911 | break; | |
912 | } | |
3939c1ef | 913 | if (socket_insert(skt) == -ENODEV) { |
1da177e4 LT |
914 | ret = -ENODEV; |
915 | break; | |
916 | } | |
917 | ret = 0; | |
918 | } while (0); | |
7fe908dd | 919 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
920 | |
921 | return ret; | |
922 | } /* insert_card */ | |
33519ddd DB |
923 | EXPORT_SYMBOL(pcmcia_insert_card); |
924 | ||
1da177e4 | 925 | |
7eff2e7a KS |
926 | static int pcmcia_socket_uevent(struct device *dev, |
927 | struct kobj_uevent_env *env) | |
3ee13937 DB |
928 | { |
929 | struct pcmcia_socket *s = container_of(dev, struct pcmcia_socket, dev); | |
3ee13937 | 930 | |
7eff2e7a | 931 | if (add_uevent_var(env, "SOCKET_NO=%u", s->sock)) |
3ee13937 DB |
932 | return -ENOMEM; |
933 | ||
3ee13937 DB |
934 | return 0; |
935 | } | |
936 | ||
1da177e4 | 937 | |
378a33a6 DB |
938 | static struct completion pcmcia_unload; |
939 | ||
940 | static void pcmcia_release_socket_class(struct class *data) | |
941 | { | |
942 | complete(&pcmcia_unload); | |
943 | } | |
944 | ||
945 | ||
1da177e4 LT |
946 | struct class pcmcia_socket_class = { |
947 | .name = "pcmcia_socket", | |
87373318 GKH |
948 | .dev_uevent = pcmcia_socket_uevent, |
949 | .dev_release = pcmcia_release_socket, | |
378a33a6 | 950 | .class_release = pcmcia_release_socket_class, |
1da177e4 LT |
951 | }; |
952 | EXPORT_SYMBOL(pcmcia_socket_class); | |
953 | ||
954 | ||
955 | static int __init init_pcmcia_cs(void) | |
956 | { | |
378a33a6 | 957 | init_completion(&pcmcia_unload); |
4356d73d | 958 | return class_register(&pcmcia_socket_class); |
1da177e4 LT |
959 | } |
960 | ||
961 | static void __exit exit_pcmcia_cs(void) | |
962 | { | |
33519ddd | 963 | class_unregister(&pcmcia_socket_class); |
378a33a6 | 964 | wait_for_completion(&pcmcia_unload); |
1da177e4 LT |
965 | } |
966 | ||
967 | subsys_initcall(init_pcmcia_cs); | |
968 | module_exit(exit_pcmcia_cs); | |
969 |